Add CLI entry point umd

- add the following file:
  + src/urban_meal_delivery/console.py => click-based CLI tools
  + tests/test_console.py => tests for the module above
- add a CLI entry point `umd`:
  + implement the --version / -V option
    to show the installed package's version
  + rework to package's top-level:
    * add a __pkg_name__ variable to parameterize the package name
  + add unit and integration tests
- fix that pylint cannot know the proper order of imports in the
  isolated nox session

src/urban_meal_delivery/__init__.py

@@ -1,9 +1,15 @@
 """Source code for the urban-meal-delivery research project."""
 
-from importlib import metadata
+from importlib import metadata as _metadata
 
 
 try:
-    __version__ = metadata.version(__name__)
-except metadata.PackageNotFoundError:  # pragma: no cover
+    _pkg_info = _metadata.metadata(__name__)
+
+except _metadata.PackageNotFoundError:  # pragma: no cover
+    __pkg_name__ = 'unknown'
     __version__ = 'unknown'
+
+else:
+    __pkg_name__ = _pkg_info['name']
+    __version__ = _pkg_info['version']